Window-cleaner is a job that involves cleaning windows, both inside and outside. WIPER is a five letter word that is used to describe someone who does this job. A window-cleaner uses a WIPER to clean windows, which is usually a cloth or sponge attached to a handle. The WIPER is used to remove dirt, dust, and other debris from the window surface. Window-cleaners may also use special cleaning solutions to help them get the job done.